Highly Luminescent and Stable 2D/3D Octadecylammonium/Formamidinium Lead Bromide Perovskite Films

被引：2

作者：

Duan, Zonghui ^{[1
,2
]}

Wang, Shixun ^{[1
,2
]}

Qi, Jinsong ^{[1
,2
]}

Portniagin, Arsenii S. ^{[1
,2
]}

Doering, Aaron ^{[1
,2
]}

Kershaw, Stephen, V ^{[1
,2
]}

Rogach, Andrey L. ^{[1
,2
]}

机构：

[1] City Univ Hong Kong, Dept Mat Sci & Engn, Kowloon, Hong Kong 999077, Peoples R China

[2] City Univ Hong Kong, Ctr Funct Photon CFP, Kowloon, Hong Kong 999077, Peoples R China

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2021年 / 125卷 / 31期

基金：

美国国家科学基金会;

关键词：

LIGHT-EMITTING-DIODES; QUANTUM DOTS; SOLAR-CELLS; EFFICIENT; HALIDE;

D O I：

10.1021/acs.jpcc.1c04881

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We developed a facile approach to fabricate highly luminescent and stable quasi-2D/3D (ODA)(2)FA(n-1)Pb(n)Br(3n+1)/FAPbBr(3) (ODA: octadecylammonium; FA: formamidinium) perovskite films. Trace amounts of octadecylamine dissolved in toluene used as an antisolvent were partially protonated by FAPbBr(3) and interacted with [PbBr6](4-) octahedral layers, forming quasi-2D perovskites. Moreover, octadecylamine uniformly and densely covered the perovskite surface rendering it hydrophobic and prevented penetration of water, making these perovskite films stable and strongly luminescent in water for several tens of minutes without any encapsulation. Adjusting the concentration of octadecylamine, we were able to produce perovskite films with an exceptionally high photoluminescence quantum yield (PL QY) of 91%, which was ascribed to the efficient energy funneling from the 2D to the 3D perovskite phase and the passivation action of the organic additive.

引用

页码：17501 / 17508

页数：8

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